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Felsic metavolcanic rocks of 1835- to 1845-Ma age group

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Rhyolite to dacite and, locally, andesite tuff, breccia, and minor sedimentary rocks, including conglomerate. Exposed in central Wisconsin.
State Wisconsin
Name Felsic metavolcanic rocks of 1835- to 1845-Ma age group
Geologic age Early Proterozoic
Lithologic constituents
Major
Igneous > Volcanic > Felsic-volcanic > Rhyolite (Flow)Rhyolite to dacite and, locally, andesite tuff, breccia, and minor sedimentary rocks, including conglomerate.
Igneous > Volcanic > Felsic-volcanic > Dacite (Flow)Rhyolite to dacite and, locally, andesite tuff, breccia, and minor sedimentary rocks, including conglomerate.
Incidental
Sedimentary > Clastic > Conglomerate (Bed)Rhyolite to dacite and, locally, andesite tuff, breccia, and minor sedimentary rocks, including conglomerate.
Igneous > Volcanic > Felsic-volcanic (Volcaniclastic-volcanic breccia)Rhyolite to dacite and, locally, andesite tuff, breccia, and minor sedimentary rocks, including conglomerate.
Igneous > Volcanic > Mafic-volcanic > Andesite (Pyroclastic-tuff)Rhyolite to dacite and, locally, andesite tuff, breccia, and minor sedimentary rocks, including conglomerate.
Comments Pembine-Wausau terrane
References

Sims, P.K., 1992, Geologic map of Precambrian rocks, southern Lake Superior region, Wisconsin and northern Michigan: U.S. Geological Survey Miscellaneous Investigations Map I-2185, scale 1:500,000.

https://pubs.er.usgs.gov/publication/i2185
NGMDB product
Counties Langlade - Lincoln - Marathon